Results 251 to 260 of about 208,412 (295)

A compensated thermal anemometer and flowmeter

Electrical Engineering, 1951
A THERMAL anemometer with unusual sensitivity, accuracy, and ruggedness has been developed for laboratory and industrial use. It operates from a heated noble metal thermopile which is placed in the airstream whose velocity is to be measured. The anemometer is practically independent of temperature over a considerable range since both the hot and cold ...
C. E. Hastings, C. R. Wcislo
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Thermal blooming compensation with adaptive optics

Optics Letters, 1978
A multidither adaptive optical system has been used to correct for thermal blooming distortions. Stable correction factors of from 1.3 to 4 have been observed. Turbulence correction in the presence of blooming has also been observed. It is suggested that the geometry of the blooming scenario (location of absorption region, slue rate, etc.) and the ...
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Thermal-blooming compensation using the CLASP system

Applied Optics, 1978
A closed-loop system for phase compensation of thermal blooming has been designed and tested. This system-called CLASP for closed-loop adaptive single parameter-is a single-mode outgoing-wave dither system. CLASP has demonstrated stable convergence to the optimum thermal-blooming-correction amplitude in a laboratory experiment.
C A, Primmerman, F B, Johnson, I, Wigdor
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Thermal blooming compensation instabilities

Journal of the Optical Society of America A, 1989
A general model is developed for the time-dependent growth of small perturbations in thermally bloomed beams with and without correction. Intensity and phase every where along the path of an intense forward beam and a weak backward beam are determined from the initial beam and path conditions by five time-dependent Green functions.
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Measurement of surface temperature with a thermally compensated probe

Journal of Physics E: Scientific Instruments, 1971
An electronically controlled differential transducer using microthermocouples (diameter <30 mu m) has been developed. The transducer is suitable for measuring the surface temperature of a small area (<1 mm2) when the thermal conductivity of the surface is low. The contact pressure of the transducer is very low, so that it is possible, for example,
K, Kalliomäki, P, Wallin
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On the thermal sampling compensation law

Journal of Electrostatics, 1999
Abstract The arguments presented earlier by the author in this journal (J. Electrost. 36 (1996) 323), in order to explain the appearance of a compensation law in window polarization experiments performed at poling temperatures near the polymer transition temperature T g by a structure-dependent activation energy, are rephrased.
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Thermal-Frequency-Drift Compensation

Proceedings of the IRE, 1942
The conditions necessary for minimizing frequency drift with variation of ambient temperature are examined for various types of circuits. In fixed-tuned circuits the drift can be eliminated by a comparatively simple adjustment of the temperature coefficient of capacitance.
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Thermally compensated crystal oscillators

Journal of the British Institution of Radio Engineers, 1958
The paper describes a new approach to the problem of “frequency-versus-temperature” stability. The principle involved is particularly suitable for the special requirements of mobile and portable communications equipment. In contrast to oven-controlled crystal oscifiators the technique requires neither the expenditure of power nor the use of thermostats
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Compensation Law in Thermodynamics and Thermal Death

Nature, 1973
THE isokinetic relationship or, more generally, the compensation law, a linear relation between enthalpy and entropy, has been debated for many years. Evidence for it occurs in phenomena such as chemical reactions, solubility, evaporation of metals, catalytic processes, thermal denaturation of macromolecules, thermal killing of unicellular organisms ...
GABOR KEMENY, BARNETT ROSENBERG
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Thermal compensation of a cw-pumped Nd:YAG laser

Applied Optics, 1998
Thermally induced lensing and birefringence modify the transverse laser profile and may eliminate any global polarization state in systems utilizing Nd:YAG as a gain medium. This creates fundamental difficulties in obtaining a high-power, polarized output beam.
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